# class pos:
#     def __init__(self, cash=100000000, fee=0.0008, posrate=1, targetnum=60, trademode="close", ip="192.168.10.44")
#     def __init__(self, cash=10000 * 100, trademode="close", fee_size=1, slippage=1, ip="127.0.0.1")
#     def __init__(self, cash=10000 * 100, trademode="close", fee_size=1, slippage=1)
#     def __init__(self, cash=10000 * 100, limitcash=10000 * 100, trademode="close", fee_size=1, slippage=1):